For more than a century, fasting has been used as a weight loss treatment.
I have he spoke on the benefits of caloric restriction. Well, the biggest caloric restriction is not taking in any calories at all. Fasting was marked “the next big weight loss fad,” but it has a long history in various spiritual traditions, experienced from Moses, Jesus, Muhammad and Buddha. In 1732, a distinguished physician He wrote, “He who eats until he is sick must fast until he is well.” About one in seven American adults today report following this advice, “using fasting as a means of weight control” as I discuss in my video The Benefits of Fasting for Weight Loss Are Tested.
Case reports of treating obesity through fasting date more than a century in the medical literature. In 1915, two Harvard physicians inelegantly described “two extremely fat women,” one of whom “was a veritable pork barrel.” Their success led them to conclude that “consecutive moderate periods of starvation are a completely safe, harmless and effective method of reducing the weight of those suffering from obesity”.
The longest recorded rapid, published in 1973, reached the Guinness Book of World Records. To reach his ideal body weight, a 27-year-old man he fasted for 382 consecutive days, losing 276 pounds, and managed to keep almost all of it off. They gave him vitamin and mineral supplements to keep him from dying, but no calories for over a year. In the researchers’ acknowledgments, they thanked him “for his cheerful cooperation and steadfast application to the task of achieving normal physique.”
In a US Air Force study, more than 20 people were at least 100 kg overweight, and most “cannot I lose weight on previous diets’ were fasted for 84 days. Nine dropped out of the study, but the 16 who remained “had unequivocal success” in losing 40 to 100 pounds. In the first four days, it noted that subjects lost up to four kilograms per day, which “probably represents mostly fluid,” mostly water weight as the body begins to adapt. But after a few weeks, they were steadily losing about a pound a day of mostly straight fat. The researcher described the starvation program as “a dramatic and exciting treatment for obesity”.
Of course, the single most successful diet for weight loss—that is, no diet at all—is also the single least sustainable. What other diet can cure morbid obesity in a few months, but is practically guaranteed to kill you within a year if you follow it? The reason diets don’t work, almost by definition, is that people go on them and then give up. Permanent weight loss is only achieved by permanent lifestyle change. So what’s the point of fasting if you’re just going to go back to your normal diet and immediately gain back all that lost weight?
Proponents of fasting mention the psychological benefit of realigning people’s perceptions and motivations. Some people have given up on the belief that losing weight for them is somehow impossible. They can I think so “That they are ‘made different’ than normal weight ones” somehow and no matter what they do, the pounds just don’t come off. But their rapid, undeniable weight loss during the fast shows that with a big enough change in eating habits, it’s not just possible, but inevitable. This morale boost can then encourage make better food choices once they start eating again.
The break from eating can allow some an opportunity to “pause and reflect” on the role food plays in their lives—not only the power it has over them but also the power they have over it. In a fasting study with Title “Correcting and Controlling Intractable Obesity,” a patient’s personality is described as changing “from a despairing, despairing, to that of an eager extrovert full of plans for a promising future.” She realized her burden was within her power to control. The researchers concluded: “This highly intellectual social worker has returned to a full degree of extraordinary usefulness.”
After a quick, new commitment to healthier eating it can be facilitated with a reduction in overall appetite reported after fasting, compared to pre-fasting, at least temporarily. Even during a fast, hunger can set in dissolve within the first 36 hours. So, provocative people’s delusions about their exceptionality to the laws of physics—thinking they are “made different”—with “short periods of absolute fasting can seem barbaric. In fact, this method of weight reduction is extremely well tolerated by obese patients.” This appears to be a recurring theme in these published case series. In the influential paper “Treating obesity with total fasting for up to 249 days,” researchers he noticed that “the most surprising aspect of this study was the ease with which prolonged fasting was tolerated.” All of their patients “spontaneously commented on their increased sense of well-being, and for some, this amounted to downright euphoria.” They continued that although “absolute fasting therapy should only be prescribed under close medical supervision,” “they are convinced that it is the treatment of choice, certainly in cases of gross obesity.”
Fasting for a day can I make, I do irritable people and touch moody and distracted, but after a few days of fasting, many report feeling clear, excited, and alert—even euphoric. This may in part be due to the significant increase in endorphins that accompanies fasting, as you can see in the graph below and at 5:48 in my video. Improving mood during fasting is thought may represent an adaptive survival mechanism to motivate foraging. This positive outlook on the future can then facilitate the behavioral change necessary to lock in some of the weight loss benefits.
But is this happening? Is fasting really effective in the long run? There is articles with headlines like “Death During Obesity Therapeutic Starvation.” Is fasting still safe? We will find out later.
This is the sixth in a 14-part series on fasting for weight loss. In case you missed any of the others, check out the related videos below.
My book How not to diet it’s all about weight loss. You can learn more about it and order it here.
